feat(lint): add type-aware parsing and validate script

[overbalance]

Note

Please review #88 before looking at this PR.

What problem is this solving?

Adds build validation and type-aware baseline checking to catch non-baseline Web APIs and ensure package integrity.

Short description of changes

• Add type-aware parsing (projectService: true) for baseline detection of instance methods
• Add eslint.dist.config.js for compiled output checking
• Add scripts/validate.js with 5 checks: syntax compliance, Web API baseline, package exports/sourcemaps, bundle size, module integrity
• Pin dependency versions
• Update CI workflow to run validate

Testing

• npm run lint passes
• npm run validate passes all 5 checks